Balance-wheel poising and truing machine.



C. E. SANFORD. BALANCEWHEEL POISING AND TRUING MACHINE. APPLICATION FILED APR.2I. |916.

1,228,053; v Patented May 29, 1917.1

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vCHARLES E. siiivroian, oFiivnw Yoann. Y.

BALANCE-WHEEL roisiive AND TRUING MACHINE.

Specification of Lettersk Patent.

Patented May 29, 191'?.

Application led April 21, 1916. Serial N o. 92,603.

' 5 York and State of New York, have invented certain new and useful Improvements in Balance-Wheel Poising and Truing Machines, of which the following is a specification.

` This invention relates to improvements in balancing and truing wheels, and its principal object is to provide a mechanism in which the wheel to be trued may freely rotate allowing the heavy side to hang pendant through gravity.

Another object is to providey means for lightening the heavy portion of the Wheel to such an extent as may be desired.

A further object is to provide means whereby the drillings or chips are removed without attentionv on the part of erator.

These and other objects are attained byy the novel construction and combination of parts hereafter described and shown in the accompanying drawings, in which Figure 1 is a general perspective view of the apparatus, together with the power means employed.

Fig. 2 is a plan view of the machine.

Fig. 3 is a vertical sectional view taken on line 3 3 of Fig. 2. Y

Fig. 4 is an endview of the saine, looking from the control end, and

Fig. 5 is a sectional view taken on line 5 5 of Fig. 2.

In order to properly balance wheels of this character, it has been customary to place the saine, or rather the shaft or stem passing through the wheels, upon V blocks or horizontal rails, agitating the wheel so that it is caused to oscillate, bringingv the heavy portion vertically below the center.

Then after marking or otherwise determining the heavy point, the wheel is removed and filed or drilled to such an extent as to cause the same to be better balanced; these operati-ons being continued until such time as the wheel action indicates 'that it balances.

In the present device the wheel,- herein indicated by the numeral 10, is shownto be mounted upon a staff 11, the `same having short conical points, one of which is seated in a hardened conical center 15, the other being received in a similar conical cavity formed in the slide 1.6, held normally forward by means of a spring 17 contained in a recessin-the support'18, the knob 19 being positioned upon the stein 20 so as to retract the spring and liberate the staff 11 -when desired. i v' It is to be understood that the tension'of the spring 17 is only suflicient'to holdfthe staff in its proper horizontal position, allowing it to rotate with entire freedom within the conical cavities in which itis mounted, l

until any initial momentum has subsided,

' leaving the weightiest part of the wheel rim directly below the points of support.

A drill 22, mounted-in the end of a spindle 23 and rotatable within the bearings 24 by means of a pulley 25, may be forced against vthe rim of thebal-ance wheel through :the knob 26, held tothe spindle 23 byv a set-screw 27 entering into an annular recess formed vnear the end'V of the spindle; so that the knob can be contained in the fingers reference to the base 29.

The motor may further drive a fan 36 or other arrangement adapted to provide a source of compressed air, the same being conveyed through the ytube 38, in which is a valve 40,.actuated by means ofva lever 41, the free end of which is engaged between adjustable disks 42 secured to the spindle 23, one yof the disks acting as a stop limiting the forward movement of the drill 42 when contact is made :with the outer bearing 24.

The tube 38 may be secured to the platform 29 by suitable clips 45, its eXtreme end being raised and turned rentrantly, ending in a nozzle 46, so disposed as to direct the air current passing through it in such manner as to blow away any chips which the drill makes when lightening the wheel rim,

and it will be noticed that the valve is so arranged that the air current is .closed when the drill is in an inoperative position, but opened when it is advanced to contact with the rim of the balance wheel.

* While the foregoing presents an embodiment of the invention, it is not desired to be held strictly to the exact construction as shown, as minor modiiications may be made without departing from the scope of the claims hereto appended.

Having .thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a machine of the class described, the combination with horizontal supports for the staff of a wheel to be balanced, one

'of said supports being rigid and the other movable, of a spindle slidable in the plane of said supports, a drill carried thereby, means for rotating said spindle, and means for moving said drill relative to the rim of said wheel.

2. In a machine for balancing Wheels, the combination with a pair of supports in which the shaft of said wheel may freely rotate in a horizontal plane, a drill slidable in a plane parallel to said supports, and positioned vertically therebelow, means for rotating said drill, and means for actuating said drill longitudinally. f

3. In a machine for balancing Wheels, the combination with a pair of supports,

one of said supports boing rigid, and the other resiliently mounted, said supports having means for engaging and disengaging the staii of a wheel, a drill mounted directly below said supports, parallel thereto, means for moving said drill axially, means for rotating said drill, a source of compressed air draft, means for conveying the air and discharging the same adjacent to the drill point when said drill is in a for` ward position, and means operative by the axial movement of said drill for opening or closing the air conveying means.

4f. In a balancing machine, a pair of cupped supports receptive of the article to be balanced, and in which it freely rotates, a drill slidably mounted to register with the rim of the article, means for actuating said drill axially, means for rotating said drill, and means for blowing away the chips produced by said drill, the air draft in said blowing means being controlled by the axial movement of said drill.

Signed at New York, in. the .county of New York, and State oit New York, this 14; day of April, 1916.

CHARLES E. SANFORD.

Copies of this patent may be obtained for five' cents each, by addressing the Commissioner of Patents, Washington, D. C. 

